Brooklyn Decker has described landing the cover of Sports Illustrated's swimsuit edition as a "dream come true".

The model wife of Andy Roddick was unveiled as the iconic magazine's newest cover girl during last night's Late Show With David Letterman.

Speaking to People, she said: "It's shocking and a dream come true!"

"My mom cried... We're all on pins and needles before the issue comes out, because the cover is something all the girls want so badly. So it's nice for my family because they don't have to stress about it anymore."

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Decker, 22, added that she is "kind of freaking out" about having to appear on chatshows to promote the issue, saying: "I've never been on one! I've done news shows, but I've never done a big talk show."